Nina Ekström

863 total citations
24 papers, 507 citations indexed

About

Nina Ekström is a scholar working on Epidemiology, Microbiology and Infectious Diseases. According to data from OpenAlex, Nina Ekström has authored 24 papers receiving a total of 507 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Epidemiology, 12 papers in Microbiology and 9 papers in Infectious Diseases. Recurrent topics in Nina Ekström's work include Pneumonia and Respiratory Infections (13 papers), Bacterial Infections and Vaccines (12 papers) and Respiratory viral infections research (11 papers). Nina Ekström is often cited by papers focused on Pneumonia and Respiratory Infections (13 papers), Bacterial Infections and Vaccines (12 papers) and Respiratory viral infections research (11 papers). Nina Ekström collaborates with scholars based in Finland, Brazil and United States. Nina Ekström's co-authors include Helena Käyhty, Arto A. Palmu, Merja Väkeväinen, Birgit Simell, Terhi Kilpi, Arja Vuorela, Antti Reunanen, Seppo Meri, Hanna Nohynek and Merit Melin and has published in prestigious journals such as Diabetes Care, The Journal of Infectious Diseases and Infection and Immunity.

In The Last Decade

Nina Ekström

24 papers receiving 502 citations

Peers

Nina Ekström
Yoshihiro Matsuzono Japan
Ernst C. Soethout Netherlands
Ronald Jacobi Netherlands
Laurence Bassinet France
Raman Lakshman United Kingdom
Lindsey I. Zimmerman United States
Maria Vono Switzerland
Chalystha Yie Qin Lee Malaysia
Dorothee Kieninger‐Baum Germany
Maria Alice Freitas Queiroz Brazil
Yoshihiro Matsuzono Japan
Nina Ekström
Citations per year, relative to Nina Ekström Nina Ekström (= 1×) peers Yoshihiro Matsuzono

Countries citing papers authored by Nina Ekström

Since Specialization
Citations

This map shows the geographic impact of Nina Ekström's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Nina Ekström with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Nina Ekström more than expected).

Fields of papers citing papers by Nina Ekström

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Nina Ekström. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Nina Ekström. The network helps show where Nina Ekström may publish in the future.

Co-authorship network of co-authors of Nina Ekström

This figure shows the co-authorship network connecting the top 25 collaborators of Nina Ekström. A scholar is included among the top collaborators of Nina Ekström based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Nina Ekström. Nina Ekström is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Uggla, Bertil, Camilla Virta, Merit Melin, et al.. (2025). Revaccination with pneumococcal conjugate vaccine five years after primary immunization improves immunity in patients with chronic lymphocytic leukemia. Haematologica. 110(8). 1774–1785. 1 indexed citations
2.
Ekström, Nina, Toni Lehtonen, Anu Haveri, et al.. (2024). Hybrid Immunity Improves the Immune Response after the Fourth COVID-19 Vaccine Dose in Individuals with Medical Conditions Predisposing to Severe COVID-19. Vaccines. 12(3). 247–247. 5 indexed citations
3.
4.
Ekström, Nina, et al.. (2023). Changes in SARS-CoV-2 seroprevalence and population immunity in Finland, 2020–2022. Emerging Microbes & Infections. 12(2). 2222849–2222849. 13 indexed citations
5.
Ekström, Nina, Camilla Virta, Pamela Österlund, et al.. (2022). Strong Neutralizing Antibody Responses to SARS-CoV-2 Variants Following a Single Vaccine Dose in Subjects With Previous SARS-CoV-2 Infection. Open Forum Infectious Diseases. 9(12). ofac625–ofac625. 4 indexed citations
6.
Ekström, Nina, et al.. (2022). Neutralizing antibodies to SARS‐CoV‐2 Omicron variant after third mRNA vaccination in health care workers and elderly subjects. European Journal of Immunology. 52(5). 816–824. 24 indexed citations
7.
Dub, Timothée, Hanna Nohynek, Camilla Virta, et al.. (2022). High secondary attack rate and persistence of SARS-CoV-2 antibodies in household transmission study participants, Finland 2020–2021. Frontiers in Medicine. 9. 876532–876532. 8 indexed citations
8.
Dub, Timothée, Merit Melin, Anu Haveri, et al.. (2021). COVID-19 outbreak at a reception centre for asylum seekers in Espoo, Finland. Journal of Migration and Health. 3. 100043–100043. 6 indexed citations
9.
Dub, Timothée, Hanna Nohynek, Camilla Virta, et al.. (2021). High Secondary Attack Rate and Persistence of SARS-CoV-2 Antibodies in Household Transmission Study Participants, Finland 2020. SSRN Electronic Journal. 1 indexed citations
10.
Haveri, Anu, Nina Ekström, Camilla Virta, et al.. (2021). Persistence of neutralizing antibodies a year after SARS‐CoV‐2 infection in humans. European Journal of Immunology. 51(12). 3202–3213. 60 indexed citations
11.
Borges, Igor C., Nina Ekström, Tuomas Jartti, et al.. (2017). Determination of avidity of IgG against protein antigens from Streptococcus pneumoniae: assay development and preliminary application in clinical settings. European Journal of Clinical Microbiology & Infectious Diseases. 37(1). 77–89. 1 indexed citations
12.
13.
Borges, Igor C., Nina Ekström, Peter V. Adrian, et al.. (2014). A fluorescent multiplexed bead-based immunoassay (FMIA) for quantitation of IgG against Streptococcus pneumoniae, Haemophilus influenzae and Moraxella catarrhalis protein antigens. Journal of Immunological Methods. 405. 130–143. 22 indexed citations
14.
Ekström, Nina, et al.. (2013). Concentration and High Avidity of Pneumococcal Antibodies Persist at Least 4 Years after Immunization with Pneumococcal Conjugate Vaccine in Infancy. Clinical and Vaccine Immunology. 20(7). 1034–1040. 22 indexed citations
15.
Simell, Birgit, Anu Nurkka, Nina Ekström, et al.. (2012). Serum IgM Antibodies Contribute to High Levels of Opsonophagocytic Activities in Toddlers Immunized with a Single Dose of the 9-Valent Pneumococcal Conjugate Vaccine. Clinical and Vaccine Immunology. 19(10). 1618–1623. 28 indexed citations
16.
Nieminen, Janne, Jukka Vakkila, Harri M. Salo, et al.. (2012). Altered Phenotype of Peripheral Blood Dendritic Cells in Pediatric Type 1 Diabetes. Diabetes Care. 35(11). 2303–2310. 27 indexed citations
17.
Simell, Birgit, Arja Vuorela, Nina Ekström, et al.. (2011). Aging reduces the functionality of anti-pneumococcal antibodies and the killing of Streptococcus pneumoniae by neutrophil phagocytosis. Vaccine. 29(10). 1929–1934. 123 indexed citations
18.
Wuorimaa, Tomi, Ron Dagan, Fabrice Bailleux, et al.. (2005). Functional activity of antibodies after immunization of Finnish and Israeli infants with an 11-valent pneumococcal conjugate vaccine. Vaccine. 23(46-47). 5328–5332. 13 indexed citations
19.
Mäkelä, P. Helena, Helena Käyhty, Tuija Leino, et al.. (2003). Long-term persistence of immunity after immunisation with Haemophilus influenzae type b conjugate vaccine. Vaccine. 22(2). 287–292. 28 indexed citations
20.
Puumalainen, Taneli, Nina Ekström, Jukka Ollgren, et al.. (2003). Functional Antibodies Elicited by an 11‐Valent Diphtheria–Tetanus Toxoid–Conjugated Pneumococcal Vaccine. The Journal of Infectious Diseases. 187(11). 1704–1708. 18 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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